“Easy, portable watch timing”

Sheldon Smith, iW Magazine

“One of the best examples of a horology focussed smartphone app”

Felix Scholz, HODINKEE

“Kello is a "must have" if you’re a serious collector”

Kevin Osborne, National Association of Watch & Clock Collectors

“It will save you time, earn you money, and prevent headaches chasing problems that don't actually exist”

Jordan Ficklen, Executive Director of the American Watchmakers-Clockmakers Institute